Updated json files to reflect that ReadScale and HighAvailabilityReplicaCount properties are not supported on pooled vldbs or any elastic pool other than Hyperscale. (Azure#17274)

Co-authored-by: Christian Valencia <cvalencia@microsoft.com>

Author: christianvalencia7

specification/sql/resource-manager/Microsoft.Sql/preview/2021-08-01-preview/Databases.json

@@ -1048,7 +1048,7 @@
           "readOnly": true
         },
         "readScale": {
-          "description": "The state of read-only routing. If enabled, connections that have application intent set to readonly in their connection string may be routed to a readonly secondary replica in the same region.",
+          "description": "The state of read-only routing. If enabled, connections that have application intent set to readonly in their connection string may be routed to a readonly secondary replica in the same region. Not applicable to a Hyperscale database within an elastic pool.",
           "enum": [
             "Enabled",
             "Disabled"
@@ -1065,7 +1065,7 @@
         },
         "highAvailabilityReplicaCount": {
           "format": "int32",
-          "description": "The number of secondary replicas associated with the database that are used to provide high availability.",
+          "description": "The number of secondary replicas associated with the database that are used to provide high availability. Not applicable to a Hyperscale database within an elastic pool.",
           "type": "integer"
         },
         "secondaryType": {

specification/sql/resource-manager/Microsoft.Sql/preview/2021-08-01-preview/ElasticPools.json

@@ -532,7 +532,7 @@
         },
         "highAvailabilityReplicaCount": {
           "format": "int32",
-          "description": "The number of secondary replicas associated with the elastic pool that are used to provide high availability.",
+          "description": "The number of secondary replicas associated with the elastic pool that are used to provide high availability. Applicable only to Hyperscale elastic pools.",
           "type": "integer"
         }
       }